Bristol Palin's ghostwriter Nancy French has really opened up about her time with the Palin family, offering compelling evidence that they are, in fact, actual human beings. There are, however, some holes in her story.

French talked to Politico about the time she spent living with the Palins while she completed their oldest daughter's memoir, Not Afraid of Life. She paints a pretty convincing portrait of the family as members of Homo sapiens — let's take a look at the data:

The Palins have a kitchen. Their kitchen has an island.

They eat food. Common Palin dishes include such human favorites as salmon and spaghetti.

When they travel, they stay in hotels, a known habitat for humans.

They care for their young: says French, "I loved seeing [Sarah Palin] and Todd fussing over Trig, kissing him and playing with him on the floor."

They enjoy human pastimes such as bowling.

Bristol, at least, appears able to communicate with humans: "We would just sit on the couch and drink coffee and talk," says French.

The above is certainly compelling, but French does let slip one detail that contradicts her claim: the Palins habitually feast on "moose hot dogs." This leaves open the possibility that they may be aliens, or bears.